Valve.



E. A. LOWE. VALVE. APPLICATION FILED SEPT. 16, 1911.

1,017,434. Patented Feb. 13, 1912.

5 J E l I 6 nnomvzrs UNITED STATES ELLSWOR'IH ADELBERT LOWE, OF SOUTHLEE, NEW HAMPSHIRE.

VALVE.

Specification of Letters Patent.

Application filed September 16, 1911.

Patented Feb. 13, 1912.

Serial No. 649,672.

To all whom it may concern:

Be it known that I, ELLSWORTH A. LOWE, a citizen of the United States,and a resident of South Lee, in the county of Straiford and State of NewHampshire, have invented a new and Improved Valve, of which thefollowing is a full, clear, and exact description.

As is well known to those skilled in this art, the constant opening andclosing of the port in a valve provided with a threaded valve stem, willin time cause the mating threads between the stem and its casing tobecome worn; and particularly is this true in the case of a so-calledglobe valve where the closing of the valve is accomplished by theforcing of the valve head with considerable pressure against its seat,and this pressure places considerable strain on the threaded connectionbetween the valve stem and its casing. In time, this wearing of thethreads will result in a stripping of one or both of the threads,rendering the valve practically useless.

The object of the present invention is to produce an attachment forvalves of the globe valve type whereby in the event of the partialdestruction of the threaded connection between the valve stem and itscasing, a supplementary or auxiliary threaded connection is providedwhich will insure the proper and desired operation of the valve stem andits head, and prolong the life of the valve. 1

To the above ends, the invention consists of the attachment for valveswhich will be hereinafter described and claimed.

Reference is to be had to the accompanying drawings constituting a partof this specification, in which similar characters of reference denotecorresponding parts in all the views and in which Figure 1 shows a frontelevation of a valve, parts being shown in vertical section, andillustrating the attachment constituting the present invention. Fig. 2shows an un-' der plan view of the attachment.

In the drawing A indicates a valve of the well known globe type havingthe upwardly extending casing a. The valve stem B passes through thecasing a, and is provided with a screw thread I) which originally has athreaded engagement with a mating thread a upon the interior of thecasing a, but which latter thread, as the apparatus is illustrated inthe drawing, is shown as stripped wheel D which is detachably securedthereto by a nut d.

The parts as described are constructed, organized and arranged in amanner common to the globe valves of the prior art, and in and ofthemselves, constitute no part of the present invention, it beingunderstood that the lower end of the stem B is provided with a suitablehead (not shown) arranged to have a close engagement with a valve seat(not shown).

It is of course understood that when the threaded connection between thevalve stem and its casing is destroyed, the valve is practicallyuseless. In order to prolong the life of the valve under suchconditions, I provide a sleeve 1, which is arranged to be detachablyconnected to the bonnet C of the valve casing A, as by means of the setscrews 2 which pass through threaded apertures in the sleeve 1 andengage the surface of the bonnet C. This sleeve 1 is of course of ashape to fit the external formation of the bonnet C, and inasmuch asvalve bonnets are ordinarily made polygonal in cross section andgenerally hexagonal, the lower end of the sleeve 1 will be hexagonal asshown in Fig. 2. At its upper end the sleeve 1 is substantiallycylindrical and is provided with a screw thread 3. Cooperating with thesleeve 1 isa cap 4: which is arranged to be detachably connected as bymeans of a set screw 5 to the valve stem B, and the cap 4 is providedwith a cylindrical flange 6 arranged to receive the threaded cylindricalportion of the sleeve 1, and is provided upon its inner surface with ascrew thread 7 mating with the screw thread 8.

Whenever the threaded connection between the valve stem B and the casingor becomes stripped, the hand wheel D may be removed from the valve stemB, and the sleeve 1 secured to the bonnet C. Thereupon the cap 1 isfitted to the stem B and threaded to the upper end of the sleeve 1,after which the set screw 5 is tightened so as to cause the cap 4 totravel with the valve stem B. Thereupon the hand wheel D is replaced,and upon being turned causes a turning of the stem B together with thecap 4, and the threaded connection between the cap 1 and the sleeve 3causes the valve stem to be raised and lowered to operate the valve.

While I have in the accompanying drawing and foregoing specificationdescribed my attachment as having a screw threaded connection comprisingan external thread on the sleeve 1, and an internal thread on the cap 4,it is of course understood that the device may be constructed with aninternal thread on the sleeve 1 and an external thread on the cap 4Without departing from the spirit and scope of my invention.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. In a valve, a sleeve, means to detachably securethe sleeve to the bonnet of the valve, a cap, means to detachably securethe cap to the valve stem, and a threaded connection between the sleeveand cap.

2. In a valve, a sleeve, means to detachably secure the sleeve to thebonnet of the valve, a screw thread upon the outer side of said sleeve,a cap, means to detachably secure the cap to the valve stem, and a screwthread upon the inner side of the cap mating with the screw threads onthe sleeve.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ELLSWORTH ADELBERT LOWE. l/Vitnesses EDWIN F. BENNETT, WALTER E. DARRES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

